2266135826161 has 3 divisors (see below), whose sum is σ = 2266137331531. Its totient is φ = 2266134320792.

The previous prime is 2266135826159. The next prime is 2266135826233. The reversal of 2266135826161 is 1616285316622.

The square root of 2266135826161 is 1505369.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 962519928561 + 1303615897600 = 981081^2 + 1141760^2 .

It is not a de Polignac number, because 2266135826161 - 2¹ = 2266135826159 is a prime.

It is a super-2 number, since 2×2266135826161² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2266135826761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 752685 + ... + 2258053.

Almost surely, 2^{2266135826161} is an apocalyptic number.

2266135826161 is the 1505369-th square number.

2266135826161 is the 752685-th centered octagonal number.

It is an amenable number.

2266135826161 is a deficient number, since it is larger than the sum of its proper divisors (1505370).

2266135826161 is an frugal number, since it uses more digits than its factorization.

2266135826161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3010738 (or 1505369 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 49.

Multiplying 2266135826161 by its sum of digits (49), we get a square (111040655481889 = 10537583²).

The spelling of 2266135826161 in words is "two trillion, two hundred sixty-six billion, one hundred thirty-five million, eight hundred twenty-six thousand, one hundred sixty-one".